function [x,y,s] = mask(a,idx,orient,vals)

x = cell(5,1);
y = cell(5,1);
s = cell(5,1);

x{1} = [-1 -1 2.4 2.4 -1];
y{1} = [-1 1 1 -1 -1];
s{1} = 'k';

x{2} = [-0.35 -0.35 0 0.35 0.35];
y{2} = [-0.35 0.35 0.05 0.35 -0.35];
s{2} = 'b';

x{3} = [0.7 0.7];
y{3} = [-0.35 0.35];
s{3} = 'b';

x{4} = [1.05 1.75];
y{4} = [-0.35 0.35];
s{4} = 'b';

x{5} = [1.05 1.75];
y{5} = [0.35 -0.35];
s{5} = 'b';
